package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.awt.datatransfer.FlavorEvent;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

@Service
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;

    /**
     * 新增菜品和对应的口味
     *
     * @param dishDTO
     */
    @Transactional
    public void addDish(DishDTO dishDTO){
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.insert(dish);
        List<DishFlavor> flavors = dishDTO.getFlavors();
        Long id = dish.getId();
        if(flavors!=null&&flavors.size()>0){
            flavors.forEach(flavor ->{flavor.setDishId(id);});
            dishFlavorMapper.flavorinsert(flavors);
        }
    }

    @Override
    public PageResult page(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }
    /**
     * 菜品批量删除
     *
     * @param ids
     */
    @Override
    @Transactional
    public void delete(List<Long> ids) {
        for(Long id:ids) {
//            起售中的菜品不能删除
            Dish dish = dishMapper.lookid(id);
            if (dish.getStatus() == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
            List<Long> setid = setmealDishMapper.looksetmealDishid(ids);
            if(setid!=null&&setid.size()>0){
                throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
            }
            for (Long id:ids){
                dishMapper.delete(id);
                dishFlavorMapper.deleteFlavor(id);
            }
    }

    @Override
    public DishVO lookid(Long id) {
        Dish dish = dishMapper.lookid(id);
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;
    }

    @Override
    public void update(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);
        dishFlavorMapper.deleteFlavor(dishDTO.getId());
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors!=null && flavors.size()>0){
            flavors.forEach(flavor ->{flavor.setDishId(dishDTO.getId());});
            dishFlavorMapper.flavorinsert(flavors);
        }
    }

    /**
     * 根据分类id查询菜品
     *
     * @param categoryId
     * @return
     */
    @Override
    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder().categoryId(categoryId).status(StatusConstant.ENABLE).build();
        return dishMapper.list(dish);
    }
    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }
}
